Musar su Giosuè 6:78

This is also why Moses in his blessing of the tribe of Gad in Deut. 33,21 refers to that tribe as having performed צדקת ה' עשה ומשפטיו עם ישראל, "both a deed of righteousness vis-a-vis G–d and one of justice did he (the tribe) perform with Israel." From a legal point of view the tribe of Gad did only have to take part in the conquest of the land, something which took seven years. The additional seven years that were required to parcel out the land was an act of צדקה, something volunteered. By honoring this voluntary undertaking, the tribe qualified for Moses' unstinting praise. The Torah wishes us to apply such modes of behavior not only when it concerns utterances that may be financially costly for us, but also when such utterances imply undertakings by our souls, i.e. our religious conduct.

The Parshah mentions only the number of Israelites, and the fact that the Levites from the age of thirty days and over were chosen to replace the firstborn. The number given for the Levites in this Parshah is only that of the Kehatites, since the מחנה שכינה contained the כהנים who came from their ranks. The reason why the כהנים were included in the count of the Kehatites is that we find the Priests carrying the Holy Ark on three occasions, though that assignment was usually reserved for the Levites of the family of the Kehatites. These three occasions were: A) When Israel crossed the Jordan (Joshua 3,3), see the commentary of Kimchi there. B) When they marched around the city of Jericho (Joshua 6,12-13), and C) when the Holy Ark was returned to where it belonged during the uprising of Absalom against David (Samuel II 15,29).